70results about How to "Reduce stress changes" patented technology

A set of supports are advantageously disposed on a top plate having a polishing surface useful for polishing workpieces, thereby applying substantially uniform pressure to the top plate. In a preferred embodiment, the supports are non-isosceles triangular elements distributed evenly at 45 degree increments around a ring-shaped top plate. This structure effectively compensates for radial stress variations arising from non-optimum positioning of support points with respect to the inner and outer diameters of the polishing surface.

A glass vacuum solar heat collection tube of through two-end type consists of external glass tube, internal tube with corrugated body, absorption coated layer, elastic support and degasser. It is featured as setting space between two said tubes to be vacuum cavity, melt-jointing two ends of two said tubes to be an integral body for sealing two ends with each other and setting circular wave form ledges on internal tube to be distributed in mode of group wave ledges being not continuously set.

The invention discloses an anti-fatigue phase change storage unit with low power consumption, comprising a lower electrode, a dielectric material transition layer located above the lower electrode, a composite phase change material layer located above the dielectric material transition layer and an upper electrode located above the composite phase change material layer. The dielectric material transition layer adopts a first dielectric material which is one or more of Ta2O5, TiO2 and CeO2; and the composite phase change material layer adopts a composite material consisting of a phase change material and a second dielectric material which is one or more of SiO2, HfO2, Ta2O5, TiO2 and CeO2. The invention also provides a method for preparing the anti-fatigue phase change storage unit with low power consumption; the phase change storage unit can reduce the heat loss, prevent the phase change material volatilization, improve the heat stability, optimize the interface and decrease the stress change before and after the phase change; therefore, the phase change storage unit is beneficial for the stability of the device performance, on one hand, the power consumption of the device is reduced, on the other hand, the anti-fatigue characteristic of the device is improved.

The embodiment of the invention provides a flexible display component and a display screen. The flexible display component includes a display module, a buffer layer and at least two fixed pieces. The fixed pieces are arranged on the display module to movably fix the buffer layer on one side of the display module. When the display module is in a natural state, the buffer layer is in contact with the display module, and when the display module is in a bending state, a gap layer exists between the buffer layer and the display module. In this way, the flexible display component and the display screen can effectively improve the bending reliability of the display module.

The invention relates to an ion exchange waste water denitrification material and a preparation method thereof. A segmented copolymer containing a polyolefin acetal chain segment and a polyolefin sodium carboxylate chain segment is prepared from polyolefin alcohol and polyolefin sodium carboxylate which have low polymerization degree, as well as aldehydes, kieselguhr, kaolin, imvite and the like under the action of an initiator. The copolymer has sodium carboxylate groups, can be used as cation exchange resin, and performs the exchange with NH4<+> in waste water;and the roughness of the material can be increased by adding inorganic nanometer powder soil, and the specific surface area is increased to improve the hydrophily and affiliation capacity of microbes. The preparation method comprises the following steps of: dissolving the polyolefin alcohol and the polyolefin sodium carboxylate by using NaSCN solution, adding the initiator for polymerizing, adding a terminator and inorganic nanometer powder, stirring and mixing uniformly to prepare spinning solution, coagulating the spinning solution with inorganic salt solution in coagulating bath to form nascent fibers, performing post processing processes such as drawing, heat setting, acetalation, washing, drying and the like, and weaving to form a specific shape to obtain the required product. The material has the good mechanical strength, hydrophily, microbe affinity and ion exchange performance.

The present invention proposes a solar heat collector, the heat collector adopts a straight-through heat collecting tube as a basic component, and a special joint with a shaft shoulder and a shaft hole is arranged between the metal inner tube and the water flow channel of the heat collector. . For one or more sets of vacuum heat collecting tubes arranged side by side, the special joint can form the inlet and outlet water flow channels of the heat collector in a split type. On the basis of pressure bearing and high heat collection efficiency, the present invention uses a special joint to connect the heat collector pipes in separate parts, which better solves the stress change and axial heat loss of the existing pressure-bearing solar heat collector due to temperature changes. The problem of deformation, and realize the simplification of collector production, storage, packaging and transportation, installation, repair and maintenance, save labor and time, reduce product cost and prolong the service life of collector; it will be more conducive to bearing Popularization and application of pressure solar water heaters.

The invention belongs to the field of lithium ion batteries, in particular to a double-carbon structure modified carbon-silicon composite negative electrode material and a preparation method thereof.Double-carbon structure modified carbon-silicon composite cathode material, which has two-stage carbon structure; The nano-silica-carbon clusters with core-shell structure were dispersed uniformly inthe three-dimensional conductive carbon network to form second-order micron-sized particles. The Coulomb efficiency of the battery fabricated by this special structure silicon matrix composite as active material is above 98% after cyclic charging and discharging, and it has good capacity stability. Moreover, the stability and impact resistance are better under different current densities, and themagnification performance is much better than that of simple silicon battery material.

The opening and closing operations of a poppet valve are stabilized by preventing a diaphragm and the poppet valve from being inclined so that the pressure adjusting accuracy of a regulator is increased. For that purpose, the diaphragm is fitted with a piston and the poppet valve for opening and closing a valve seat and the piston is guided for moving in the axial direction with a sleeve by slidably inserting the piston into the sleeve.

The invention discloses functional material for removing nitrogen from wastewater and a method of preparing the same. The functional material comprises hydrophilic resin and inorganic nano-powder which is adhered to the hydrophilic resin. The functional material is prepared by first synthesizing the hydrophilic resin, and then adding and stirring the inorganic nano-powder to the hydrophilic resin.The inorganic nano-powder accounts for 5-20 percent of the total functional material by weight. The surface of the hydrophilic resin is provided with hydrophilic groups so that the microorganisms canbe adsorbed on the surface of the functional material easily and can not fall off from the surface of the functional material, and the nitrogen removing ability of the microorganisms can be kept fora long time. Because the functional material comprises the inorganic nano-powder which can increase the roughness of the surface of the functional material, the microorganisms can be steadily adsorbedon the surface of the functional material, and because the inorganic nano-powder is adhered to the hydrophilic resin, the gaps formed in the functional material is small, and accordingly the change of the stress of the functional material is slowed down when the functional material is impacted by the water flow and the breaking strength of the functional material is improved.

As an oxygen diffusion prevention layer, a multilayer film formed by a metal nitride and a noble metal element. As an interlayer insulation film on the oxygen diffusion prevention layer, a plasma CVD oxide film is used. Moreover, as an interlayer insulation film on a capacitor, an ozone TEOS film is used.

The invention discloses a preparation method of a proton exchange membrane, and the method comprises the following steps: adding an initiator into a mixed solution of binary olefin amine, vinyl sulfonate and a water solvent at the reaction temperature of 65-80 DEG C under the nitrogen condition to initiate free radical polymerization reaction of the binary olefin amine and the vinyl sulfonate to obtain a linear prepolymer solution; then mixing the linear prepolymer solution with a perfluorinated sulfonic acid resin dispersion liquid and mixed polyol according to a preset proportion for reaction to obtain polymer slurry; and finally, coating the polymer slurry to form a membrane, and drying and curing the membrane formed by coating to obtain the proton exchange membrane with a cross-linked interpenetrating network structure. According to the preparation method, a high-stability cross-linked polymer network is taken as a framework, an interpenetrating network is realized with perfluorosulfonic acid polymer molecules, the swelling degree of the proton exchange membrane is inhibited macroscopically and microcosmically, and the invention also discloses the proton exchange membrane prepared by the preparation method and a fuel cell comprising the proton exchange membrane.

The invention relates to the technical field of power transformers, and particularly discloses a manufacturing process of a rectangular nanocrystalline spraying magnetic core used in a medium-high frequency environment, which comprises the following specific process steps of 1, calculation, 2, winding, 3, preliminary shaping, 4, cooling: enabling the heated magnetic core to be subjected to air cooling treatment, and removing the tool, 5, performance improvement, 6, cooling: enabling the magnetic core subjected to heat treatment to be subjected to air cooling treatment, 7, soaking and solidifying, 8, drying, 9, removing the tool, 10, spraying, and 11, testing. The rectangular nanocrystalline spraying magnetic core manufactured through the process is not affected by mechanical stress any more, the magnetic performance is stable, medium-high frequency loss under high magnetic induction is low, and the spraying magnetic core has the advantages of being small in size and low in cost.

The invention provides an elm-shaped molybdenum diselenide@nitrogen-doped carbon nanofiber and a preparation method and application thereof, which belong to the field of ion batteries. The nitrogen-doped carbon nanofiber flexible film is prepared through electrostatic spinning and heat treatment and is used as a matrix; through hydrothermal reaction, the nitrogen-doped carbon nanofiber is coated with elm-shaped molybdenum diselenide nanosheets in situ to form a core-shell structure; a special nano structure of molybdenum diselenide has a high-activity specific surface area; aluminum storage efficiency can be improved, high specific capacity is obtained, the nitrogen-doped carbon nanofibers form a three-dimensional conductive network; a rapid electron transfer capability is provided for high-rate charging and discharging, high-power discharging and rapid charging are achieved, the three-dimensional porous nitrogen-doped carbon nanofibers can buffer stress generated in the charging and discharging cycle process, deformation of the active material is reduced, the structural stability of the active material is kept, and the cycle stability of the battery is improved.

The invention relates to the technical field of a lithium ion negative electrode material, and discloses a dried-persimmon-type core-shell-structured C/ZnO lithium ion battery negative electrode material and a preparation method thereof. Absolute ethanol, zinc acetate dehydrate, ethanolamine and glucose are taken as raw materials, and the time and temperature of a hydrothermal reaction is strictlycontrolled to prepare a dried-persimmon-type core-shell-structured C/ZnO material. Compared with a ZnO negative electrode material in the prior art, the dried-persimmon-type core-shell-structured C/ZnO with a special shape is greatly improved in conductivity and stability and obviously improved in electrochemical performance. According to the lithium ion battery negative electrode material, stress variation due to size variation in a charge-discharge process is reduced, and the dried-persimmon-type shape increases the specific surface area, so that the cycle performance of a lithium ion battery is efficiently improved. Furthermore, existence of carbon allows the conductivity of a ZnO negative electrode material to be improved.

The invention relates to a coal fire treatment and utilization system and method based on a carbon dioxide process and modular design, and the system comprises a heat source system for providing a heat source, and the heat source system is connected with a mobile power generation system for power generation; the heat source system comprises an underground coal fire core area, the underground coal fire core area is located in the coal seam, a gaseous carbon dioxide collecting well is arranged at the position, communicated with the underground coal fire core area, in the coal seam, and a carbon dioxide conveying and distributing pipe is arranged on the side edge of the gaseous carbon dioxide collecting well; the movable type power generation system comprises a movable type expansion part, a movable type pressure boosting part, a movable type liquid carbon dioxide storage tank and a movable type electric energy storage part. The side reaction of a carbon dioxide medium when the temperature is lower than 500 DEG C in the underground coal fire spontaneous combustion process is fully considered, and the comprehensive functions of underground coal fire treatment, carbon dioxide capture, modularization mobility, coal fire waste heat utilization and the like are achieved.

The invention discloses a high-performance asphalt sealing waterproof anti-corrosion adhesive and a preparation method thereof, belongs to the technical field of chemical engineering, and solves the problem that an existing waterproof adhesive deforms along with the deformation of a base material to generate cracks to cause a deformed part is invalid in waterproofing. The high-performance asphaltsealing waterproof anti-corrosion adhesive is prepared from the following components in parts by weight: 30-60 parts of petroleum asphalt, 20-30 parts of a modifier, 5-10 parts of a softener, 3-5 parts of a cross-linking agent, 1-2 parts of a catalyst, 3-6 parts of a solubilizer and 20-40 parts of a micro-expansion filler. Compared with a traditional waterproof adhesive, the high-performance asphalt sealing waterproof anti-corrosion adhesive is prepared by using the modifier, the cross-linking agent and the catalyst for crosslinking modification of the petroleum asphalt, the melting temperature is increased while the glass transition temperature is reduced, therefore construction can be carried out at normal temperature, and in a temperature range of 30-80 DEG C, the high-performance asphalt sealing waterproof anti-corrosion adhesive can keep good flexible working performance, high bonding property, high anti-permeability, and good creep property, and has aging-resistance, acid and alkali resistance and excellent self-repairing function.

The invention discloses a flat roof permeable sport field and a construction method thereof. The field sequentially comprises a permeable crystallization waterproof layer, a geocell medium-coarse sandlayer, permeable gravel concrete and a colored permeable resin sand surface layer from bottom to top. The arranged geocell medium-coarse sand layer has good frost heaving resistance is realized; thewater-permeable concrete layer is arranged in the geocell and has certain water retention, heat insulation and vibration isolation effects, under the capillary action, humid water vapor in coarse sandin the geocell has a cooling effect on the colored water-permeable resin sand surface layer through holes of the water-permeable concrete layer, the aging speed of the colored water-permeable resin sand surface layer material is reduced, and the service life of the field is prolonged. The coarse sand layer and the permeable gravel concrete layer in the geocell are mutually embedded and fixed through the geocell, so that the integrity is good, and the frost heaving resistance is high; and under the action of the moving load of the colored water-permeable resin sand surface layer, the deformation generated by the geocell is recoverable elastic deformation, so that the service life of the field is prolonged.

The invention discloses an all solid state lithium battery cathode interface modification method. An interface modification layer is 10 nm to 50 [mu]m in thickness and composed of 1-butyl-2, 3-dimethylimidazole tetrafluoro borate, lithium salt, and additives in a certain ratio. The modification layer is prepared via the following steps: a step of weighing the 1-butyl-2, 3-dimethylimidazole tetrafluoro borate, the lithium salt and the additives in a mass ratio of (69.9-90):(5-30):(0.1-5) and heating and stirring the same evenly; a step of coating a solid electrolyte layer and/or a cathode withan obtained solution and obtaining the modification layer after standing and solidifying operation. In the present invention, the 1-butyl 2, 3 dimethylimidazole tetrafluoro borate is high in ionic conductivity and wide in electrochemical window. Heating and melting the lithium salt and the additives can help further improve electrochemical performance thereof. Using the product as an interface layer can help prevent direct contact between a lithium cathode and a solid electrolyte so as to improve electrochemical performance of a solid battery.

The invention provides an ultrathin glass conveying device which comprises a plurality of transitional rollers located between a tin tank and an annealing kiln. One ends of the plurality of transitional rollers are connected to a driving device through a first transmission mechanism while the other ends of the plurality of transitional rollers are separately connected to the driving device through a second transmission mechanism; in the first transmission mechanism, a speed reducing device is fixedly connected to one end of a connecting shaft while the other end of the connecting shaft is connected to a plurality of overrun clutches, and the plurality of overrun clutches are fixedly connected to the transitional rollers, separately; in the second transmission mechanism, one end of a first coupler is connected to the transitional rollers while the other end of the first coupler is fixedly connected to the speed reducer, and the speed reducer is fixedly connected to a motor. By adopting a scheme of outputting a torque by using a single speed reducing device at one ends of the transitional rollers while outputting torques by the speed reducers at the other ends, separately, the influence caused by errors of automatic control can be overcome to a certain extent by matching with the structures of the overrun clutches, and the quality defects on the lower surface of a glass plate are reduced.

The invention discloses high-performance steel based on a fine wire drawing process and a surface treatment device of the high-performance steel, and belongs to the field of wire drawing devices. The invention discloses a high-performance steel surface treatment device based on a fine wire drawing process. The high-performance steel surface treatment device comprises a first rack, a second rack and a third rack, the second machine frame and the third machine frame are arranged on the two sides of the first machine frame respectively, sliding rails which are horizontally arranged are installed on the machine frames, and the two ends of the sliding rails extend to the second machine frame and the third machine frame; the two ends of the sliding rail are fixedly installed on the second rack and the third rack correspondingly. An objective table is fixedly installed on the upper end face of the second rack, the sliding rail passes through the upper portion of the objective table, a clamp is connected to the sliding rail in a sliding mode, and the clamp is used for clamping and fixing the steel; the sliding rail is slidably connected with a first sliding plate, and the upper end and the lower end of the first sliding plate are fixedly connected with sprayers. And the wire drawing plate is arranged on the first rack.